Cap with a built-in fan



FIG. 1 is a side elevational view of a cap with a built-in fan showing our new design; the opposite side being a mirror image thereof;

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof.

FIG. 6 is a side elevational view of a second embodiment of the cap with a built-in fan, the opposite side elevational view being a mirror image thereof.

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a bottom plan view of a modified form of FIG. 8, the top plan view, front elevational view and side elevational view being identical to FIGS. 7, 9 and 6 respectively;

FIG. 12 is a rear elevational view thereof;

FIG. 13 is a side elevational view of a third embodiment of the cap with built-in fan shown in FIG. 1, the opposite side being a mirror image thereof;

FIG. 14 is a top plan view thereof; and

FIG. 15 is a bottom plan view thereof. 

The ornamental design for a cap with a built-in fan, substantially as shown and described. 